Heater



@pin W, R935. W. W. WILLIAMS Zmsm T l nu BY A TTORNE Y.

ep. W7, 1135.

w. w. WILLIAMS HEATER 2 sheets-sheet 2 Filed Deo. 26, 1933 IN1/EN TOR.la//M TER W. .LM/.4 L //V ATTORNEY.

Patented Sept. 17, 1935 UNITED STATES traitant OFFICE 1 Claim.

Q This invention lrelates tor water heaters, and more particularly tothe construction of a water heater in which the water is heated by theflame from a fluid fuel burner.Y

. 4It isran, object of this'invention to provide a device of vthischaracter which may be employed lfor vthe ,heating of water for domesticor other Y purposesas well as the heating of water for a hot waterheating system or the heating of water `,.10. to produce steam eitherfor commercial purposes or for useV in connection with a steamheatingfisystem. It s-a further object of this invention to provider aVcombustion chamber therein with l, meansV for efficiently conductingthe gases of 15,A combustion-therefrom through a series of flues in@which both the combustion chamber and flues l. are entirely surroundedby the water to be heated. lItvis' another object of this invention to`provide as mall, compact heater of this character which 20is o f.particular advantage for-producing hot wafter for domestic purposes andwhich is of simple ,construction, readily assembled, and readilyinstalled in a home, and which is adapted to be Y readilyconnected to'the chimney or stack of the t``wI425,` dwelling or furnacewithin thedwelling.

With these. and other objects in view, refer- .enceismadeto theaccompanying sheets of drawings which illustrate a preferred form ofthis invention, with theA .understanding that minor .30 changes may bemade without departing from v.the sc ope thereof.

L 1n the drawings:

.Figure 1 is a view in central Vertical section f .fof a Apreferred formof this device with some parts 35 shown in elevation.

Figure 2 is a View in transverse section taken on the line 2--2, Figure1, looking in the direction of the arrows.

FigureS` is a similar View taken on the line 40 3 3, Figure 1, lookingin the direction of the arrows.

rFigure 4 is a similar view taken on the line 4%4, looking in thedirection of the arrows.

V.Figure is a view in rear elevation of Figure 1 in which the stovepipeconnection to the stack been omitted.

Figure 6 is a detail view, partly in section and partly in sideelevation, of the burner assembly and air pressure fuel delivery theretoof the 50 fluid fuel burner illustrated in Figure 1.

The drawings illustrate an embodiment of this invention as applied to ahot water heater for domestic purposes, which includes a horizontal,cylindrical, metallic casing I provided with end 55 enclosures 2 and 3surrounded by a cylindrical jacket l! spaced apart therefrom andprovidedV ywith end closures 5 and 6 with the intervening space lledwith heat insulating material 1. The

`casings i and are provided with a plurality of registering apertures 8.which are shown in Fig- 5 ure l asbeing normally closed by plugs 9 atthe bottom and connected at the top to a cold water inlet I6 and a hotwater outlet ll, in which the cold water inlet il) is connected by pipeI2 to aV source of water supply and the hot water outletv 10 li isconnected by pipe I3 for delivering the hot water where needed fordomestic purposes.

A cylindrical, metallic combustion chamber casing ifi is mounted in theend closures 2 and 5 with its aXis parallel to the axis of the casing Iand arranged with its lower side adjacent tobut ,A spaced apart from thebottom of the horizontal casing i with one end extending beyondtheouter, surface oi the closure 5 and the other end terminated adjacentthe Vertical centerl line of .the

casing I and provided with a metallic closure plate i5, which plate isprovided with a central opening and a plurality of spaced-apart similaropenings, the centers of which are arranged on a circle concentric withthe central opening. The opposite closure plate 3 of the casing I isprovided with asimilar number of similarly arranged similar openings inline with the opening in the platel. Metallic pipes ori flues I6 are4'passed Vthrough the correspondingopenings in 30 theclosures itv and 3and are secured thereto as bywelding so that the interior of thecombustion chamber casing Ill communicates through said pipes i6 to theexterior of the closure plate 3. A

cylindrical casing Il, similar in diameter toy the,35

Y casing vIll and similarly surrounding the ends of ,the pipesI6,passing through the end closure 3, s

mounted thereon and passes through the end closure 6, and to the outerend of this casing a cap IB is attached which is provided with a con- 40centric outstanding flange I9 for attachment to an elbow 2@ of the stovepipe 2l leading to the chimney.

The combustion chamber casing I4 is provided with'a cylindrical liningof refractory material 45 22 to form a combustion chamber thereinextending from the outer end of the casing but spaced apart from theclosure i5 thereof and supports a cylindrical bafe or target 23concentric with the combustion chamber but of less diameter than theinner diameter of the combustion chamber in the space between the end ofthe combustion chamber and closure I5 by preferably three extensions 24from the end walls of the lining 22 joined to the periphery of the baieor target 23 55 so that the baffle or target is spaced apart from boththe end of the combustion chamber and the closure I5.

About the exterior end of the casing I4 and refractory lining 22 a cap25 is secured, which cap is provided with a central opening throughwhich the draft pipe 26 is extended from the casing 21 of a fluid fuelburner mechanism, which casing ls secured to the said cap 25. Theinterior of the cap 25 is provided with a refractory lining 28 whichalso surrounds the draft pipe 26. The fluid fuel burner is preferably ofthe type disclosed in this applicants prior copending application SerialNumber 662,711, filed March 25, 1933, and is provided with a nozzle 29adjacent the inner end of the draft pipe 26 for delivering fuel to beignited and burned within the combustion chamber surrounded by therefractory walls 22.

It is preferable to impart rigidity to the end closures 2 and 3 abovethe combustion chamber and flues I6 by the application of tie-rods 39passing through and secured to the respective end closures as shown inFigure 1. It is also preferable to support the horizontal casing uponlegs 3| extending downward from an integral arcuate portion 32 of thesame radius as that of the casings I4 and I1, which arcuate portion 32engages and supports the underside of the casing I4 and the underside ofthe casing I1 exterior to the end closures 5 and 6.

As the fluid fuel burner illustrated is of the electrically operated andcontrolled type, a control 33 therefor is mounted on the exterior of thecasing 5, having a bulb 34 passing through both adjacent end closures Zand 5, which is adapted to be responsive to the temperature or pressureof the water or steam, as the case may be, within the casing I. Theflange I9 of the cap I8 preferably mounts a commercial stack safety 35forming a part of the fluid fuel burner control having a thermostaticelement 36 passing within the opening leading to the stack.

In the type of fluid fuel burner disclosed, fluid fuel is delivered froman electrically operated compression pump 31 through a pipe 38 to theinterior of a chamber 39 formed within a casing 40 inserted through thebottom of the casing 21 mounted upon the cap 25, which casing 40 issecured to the casing 21, as shown in Figure 6, and which casing 46supports an air delivery pipe 4I leading to the nozzle 29. A smallerfuel discharge pipe 42 is mounted concentric with and spaced apart fromthe interior of the pipe 4I and leads from the nozzle 29 to a bracket 43supported Within the chamber 39, which is provided with a duct 44communicating with the fuel pipe 42 and with the lower portion of thechamber 39. The duct 44, in communicating with the chamber 39, forms avalve seat upon the upper side of an extension of the bracket 43 for thereception of a vertically reciprocable needle valve stem 46 mounted tobe reciprocated by the movement of a float 41 pivotally mounted upon thebracket 43. When fluid fuel and air under pressure are delivered throughthe pipe 38 to the chamber 39, the oil separates out and co1- lects inthe bottom of the chamber while the air passes through the air dischargepipe 4I to the nozzle 29. As the level of the fuel collecting in thebottom of the chamber 39 rises, 5

the float 41 will open the valve 45 whereby the pressure of air withinthe chamber 39 above the fuel will force the same through the duct 44and fuel discharge pipe 42 to the nozzle 29. It has been found duringperiods of non-use, 10 the needle valve stem 46 will stick in the valveseat 45. This invention contemplates the providing in the walls of thebracket 43 surrounding the duct 44 below the valve seat 45 with ascrew-threaded opening therethrough below the 15 valve seat andconcentric therewith and the insertion of a screw-threaded adjustingmember 41a therein which may be so adjusted at the factory as to becontacted by the lower end if the needle valve 46 to support the taperedend there- 20 of within the seat 45 to make just sufficient contacttherewith to close the valve and then prevent the same from sticking.

From the above disclosure, it is seen that the combustion chamber isentirely surrounded on 25 three sides by the water to be heated andparticularly by the water at its lower temperatures. The target baille23 prevents the flame from the nozzle 29 from being drawn through thepipes or ilue-s I6 by the draft of the chimney or stack, 30 if possiblefrom the nature of the fuel. In any event, the target baille beingconcentric with and of substantially equal radius to the line of thecenters of the outer pipes or flues I6 directs the heat from thecombustion chamber first against 35 the casing I4 thereabout and theninto the space between the rear of the target baille and pipe supportclosure I5 and from thence through the center and surrounding pipes orIlues I6 to the stack or chimney. These pipes I6 are in con- 40tinuatior` of the combustion chamber and are each surrounded by thewater to be heated between the end closure I5 of the combustion chamberand the more distant end closure 3 of the casing and as the heat fromthe combustion 45 chamber is diffused by the baille target thetemperature of the heated gas passing through each pipe is substantiallythe same to be transmitted to the surrounding Water.

What I claim is: 50

A Water heater including a casing to contain the water to be heated, acombustion chamber therein surrounded by the water to be heated, asource of heat for said combustion chamber, a plurality of flues leadingthe heated gases of combustion from the combustion chamber through thewater to be heated and through the more distant casing closure, saidcombustion chamber including a metallic jacket having an end closuresupporting the ends of 50 the iiues leading therefrom and a refractorylining terminated short of said end closure, and a circular refractorybaille supported by integral extensions from the lining between the endof the lining and said closure.

WALTER W. WILLIAMS.

